Automatic door-locking device.



J.& H VON FRIELING.

AUTOMATIC DOOR LOCKING DEVICE.

APPLICATION FILED OCT. 3I. l9l6.

1,2L65I I Patented Apr. 3,1917.

2 SHEETS-SHEET l.

*7 4 4 F I I; W IIIIIIIIII I I'I'IIIII 'I I J /3 J. & H. VON FRIELING.

AUTOMATIC 000R LOCKING DEVICE.

APPLICATION FILED OCT. 3 19l6.

Wit/mass Patented Apr. 3, 1917.

2 SHEETS-SHEET 2.

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J OHN VON FRIELING AND HENRY VON FRIELING, OF GAYLOBD, KANSAS.

AUTOMATIC DOSE-LOCKING DEVICE.

Application filed October 31, 1916.

To all whom it may concern:

Be it known that we, JOHN VON FRIELING and HENRY voN FnrnLiNe, citizens of the UnitedfEtat-es, residing at Gaylord, in the county of Smith and- State of Kansas, have invented new and useful Improvements in Automatic Door-Locking Devices, of which the following is a specification.

This invention relates to automatic locks,

and is especially adapted for use in connection with the doors of toilet rooms upon railway or other cars.

The object of the present invention is to provide an automatic means for locking the door of the toilet room of a railway or other car, asit approaches the town.

Another object is to provide an automatic means for unlocking the said door just after the car leaves the town.

With these and other objects in view the invention consists of a spring pressed rack bar, mounted beneath the car, a ramp located in the path of the rack bar, gears operated by the said bar and provided with ratchets to allow them to turn only in one direction, a pitman operated by the said gears and a pivoted bar connected to the pitman for operating the lock of a bolt within the car.

In the drawings Figure 1 is a longitudinal sectional view of a portion of a railway car having the invention applied thereto, the ramp for operating the invention being shown in a position about to engage the spring pressed bar;

Fig. 2 is a horizontal sectional view of the mechanism located beneath the car, this section being taken on the line 22 of Fig. 1;

Fig. 3 is a detailed view of the ratchet mechanism;

Fig. 4 is a detailed sectional view through the ratchet mechanism on the line H of Fig. l;

Fig. 5 is a diagram illustrating the position of the pivoted lever and the bolt when the door is locked;

Fig. 6 is a similar view with the door unlocked.

In the operation of railway coaches it is very desirable that the doors of the lavatories be securely locked when passing through a town, and that they be unlocked after the town is passed. This duty falls to the members of the train crew, and is Patented Apr. 3, 1917..

Serial No. 128,792.

sometimes forgotten or neglected, which causes annoyance either to the passengers, or to the railway officials. It is to overcome these disadvantages that we have provided the following described invention.

In the practical construction of the in vention there is provided beneath the car 1 a suitable supporting arm, comprising a substantially semi-circular member 2, and a cross bar3. This arm is provided with a sliding bearing 1 in which operates a rack bar 5. An arm 6 secured to the truck 7 of the car is provided upon its outer end with a bearing 8 through which the bar 5 is also adapted to operate. Tnterposed between the bearings 4 and 8 is a coil spring 9 the action of which is to force the bar 5 downwardly, a suitable stop or collar 10 being provided upon the bar to limit its downward movement. Upon the lower end of the bar 5 is a roller 11, and secured to the ties of the track in the path of this roller, is a ramp 12.

Upon the opposite end the bar 5 is provided with rack teeth 13, adapted to engage the teeth of the pinion 14-, mounted upon the axle 15 in bearings provided in the bar 3. Loosely mounted upon the shaft 15 is a" gear wheel 16, which is adapted to be locked to the said shaft through the medium of suitable ratchet mechanism. This mechanism consists of a disk 17 fixed upon the shaft 15, and having pivoted thereon as at 18 a number of pawls 19. Springs 20 urge these pawls into engagement with ratchet teeth 21 formed upon the interior of the gear wheel 16.

Meshing with the wheel 16 is a gear wheel 22, having its shaft 23 journaled in bearings in the bar 3. Upon the shaft 23 is mounted a disk 24: having pivoted thereon a pitman 25. A pivoted lever 26 is connected to this pitman, and has its opposite end connected to a suitable pulley 27, for looking the door of the lavatory shown at 28.

In the operation of the invention as above described the roller of the rack bar 5 is adapted to be raised against the action of the spring, by the ramp 12, which is located just in advance of the town. The raising of the bar 5 causes the wheel 14 to be rotated one half of its circumference, there being just enough teeth in the rack bar to cause this rotation. This causes the disk 24 to revolve one half way around through the medium of the gears 16 and 22,

the said disk operating the pitman and rockingthepivote'd lever26 torelease the bolt'27 as shown in Fig. 5. Aftervthe roller 11 has passed over the ramp the rack bar '5 is returned .to its original position through mentvvith another ramp, this action causing the movement of the gears 16 and 22, and

- *Gopies or this patent may be obtained for the pitman 25, vvhich moves the pivoted le- ,ver 26 in a direction to Withdraw the bolt 27 and unlock the door.

Having, described our invention What We claimisz 1. An automatic locking device compris- 7 ing a plurality of gears, means for automatically revolving said gears in one direction only to operate a locking bolt.

2. I11 combination with a car, a ramp located in the path of said car, a vertical spring pressed rack bar operated by said ramp, gears operated by said bar, and adapted to turn only in one direction and a locking means operated by said gears.

3. In combination with a car, a ralnplocated in the-path of said car, a vertlcal spring pressed rack bar operated by said ramp, gears operated by said rack bar, a

ratchet mechanism for said gears, apitman operated by said gears, and a pivoted lever connected to said pitman for locking and unlocking a door.

In testimony whereof We affix our signatures.

JOHN VON FRIELING. HENRY VON FRIELING.

five cents each, by addressing the Commissioner of Patents, Washington, D. G.- 

